cosmicstack-labs mercury-agent up to 1.1.12 run_command permissions.ts PermissionManager.checkShellCommand privileges assignment

Summaryinfo

A vulnerability was found in cosmicstack-labs mercury-agent up to 1.1.12. It has been rated as critical. This issue affects the function PermissionManager.checkShellCommand of the file src/capabilities/permissions.ts of the component run_command Handler. Performing a manipulation results in privileges assignment. This vulnerability is cataloged as CVE-2026-18996. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability classified as critical has been found in cosmicstack-labs mercury-agent up to 1.1.12. This affects the function PermissionManager.checkShellCommand of the file src/capabilities/permissions.ts of the component run_command Handler. The manipulation with an unknown input leads to a privileges assignment vulnerability. CWE is classifying the issue as CWE-266. A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-18996. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details and a public exploit are known. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The exploit is shared for download at github.com. It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• cosmicstack-labs

Name

• mercury-agent

Version

• 1.1.0
• 1.1.1
• 1.1.2
• 1.1.3
• 1.1.4
• 1.1.5
• 1.1.6
• 1.1.7
• 1.1.8
• 1.1.9
• 1.1.10
• 1.1.11
• 1.1.12

Website

• Product: https://github.com/cosmicstack-labs/mercury-agent/

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Submitinfo

Accepted

• Submit #862625: cosmicstack-labs mercury-agent 1.1.12 Incorrect Privilege Assignment (CWE-266) (by ChenMarry)

Duplicate

• Submit #XXXXXX: Xxxxxxxxxxx-xxxx Xxxxxxx-xxxxx X.x.xx Xxxxxxxx Xx Xxxxxxxxx Xxxxxxxxxxx Xx Xx Xxxxxxxxxxxx Xxxxx (xxx-xxx) (by ChenMarry)
• Submit #XXXXXX: Xxxxxxxxxxx-xxxx Xxxxxxx-xxxxx X.x.xx Xxxxxxxxx Xxxxxxxxxxxxx (xxx-xxx) (by TrumpChen)
• Submit #XXXXXX: Xxxxxxxxxxx-xxxx Xxxxxxx-xxxxx X.x.xx Xxxxxxxx Xxxxxxxxxxxxx (xxx-xxx) (by TrumpChen)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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